/**
 * #      419
 * 名称   甲板上的战舰
 * 链接   https://leetcode-cn.com/problems/battleships-in-a-board
 * 题解   [112](https://leetcode-cn.com/problems/battleships-in-a-board/solution)
 * 通过率 75.2%
 * 难道   中等
 */

